Doorlatch



E. A. JACOBSON DOORLA'ICH Filed Oct. 5, 1933 5 Sheets-Sheet 2 Inventorj. v7. Ja cofiwo/ Attorney Patented Apr. 24, 1934 DOORLATCH Ernest AxelJacobson, New Sweden, Maine Application October 5, 1933, Serial No.692,333

1 Claim.

This invention relates to an improved spring projected mechanical camretracted latch structure suitable for use on doors and equivalentclosures.

Briefly stated the invention has reference to that class of latchconstructions wherein the assembly includes a barrel for placement in amortise in the door, said barrel serving as an adapter casing for areciprocatory projectable and retractable latch bolt and associatedspring, the latch bolt being provided with at least one cam lug forcooperation with complemental cams on a manually operable push-pulltrigger or actuator plate 1 which is disposed at a right angle to thecam lug and conveniently constructed for manipulation either as a pushbutton or a pull handle.

In perfecting the particular arrangement destined to serve the purposesof my particular improvements and refinements I provide, first, animproved reversible latch bolt formed intermediate its ends with a notchhaving its opposite end portions fashioned to provide duplicate camlugs.

Secondly, a structural distinction is found in the particularconstruction of the push-pull actuator plate which is of flatrectangular cross sectional type, provided intermediate its ends with aif-shaped notch defining cam surfaces and having its ends portionsprovided with screw-threaded studs to accommodate detachable knobs.

A still further feature is based upon a latch plate of theaforementioned type provided at a predetermined point with a keeper holeto accommodate a swingable locking pin forming an independent andselectively operable part of the complete assemblage.

Other features and advantages may become apparent from the followingdescription and drawings.

In the drawings Figure 1 is a side elevational view of a fragmentaryportion of a door equipped with the improved latch arrangement.

Figure 2 is an end view of Figure 1 observing the same in the directionfrom left to right.

Figure 3 is a horizontal sectional view taken approximately on the planeof the line 3-3 of Figure 1.

Figure 4 is a vertical section, partly in elevation, taken on the planeof the line 4-4 of Figure 2.

Figure 5 is a detail elevational view of the mortise unit.

' Figure 6 is a perspective view of the push-pull actuating plate.

Figure 7 is a perspective of the latch bolt. Figure 8 is a section onthe plane of the line 88 of Figure 1.

. Referring now to the drawings by distinguishing reference numerals andconsidering Figure 5 it will be observed that the numeral 9 designateswhat may be distinguished as the mortise unit. This comprises a facingplate 10 of appropriate formation and an integral cylindrical barrel 11disposed at right angles thereto and constituting a casing. This isformed intermediate its ends with diametrically opposite accommodationand guide slots 12 for the actuator plate shown in Figure 6. Referringto Figure 6 it will be observed that this plate is of flat form anddenoted by the numeral 13. It is rectangular in cross sectional shapeand rectangular in top plan view. At opposite ends it is formed withintegral screwthreaded studs 14 and 15 of duplicate form. Intermediateits ends on one longitudinal side is provided with a V-shaped notch 16which defines a pair of alternately operable cam actuating surfaces 17and 18. Adjacent the cam surface 18 the plate is provided with a hole 19which functions as a keeper and on one side of this is an inclined ortapered depression 20 which serves as a guide for the locking means.

The locking means as shown in Figure 8 comprises a supporting plate 21and an oscillatory shaft 22 mounted therein and provided with a knob 23.On the inner end of the shaft is a depending locking pin 24 whichisadapted to swing from right to left into the keeper hole 19 as isevidenced by examining Figure 1.

I next call attention to the facing plate 25 secured to opposite sidesof the 'door 26 by suitable fastening screws or equivalent elements 27.These plates are provided with slots in registry with the aforesaid slot12 and by properly aligning this series of slots the push-pull actuatingplate 13 is permitted to work back and forth so that it extends onopposite sides of the door. When assembled this plate is arranged sothat the cam surfaces 17 and 18 cooperate with the cam lugs carried bythe reciprocatory latch bolt 28. This bolt is shown in Figure 7 in acylindrical form and slides back and forth in the casing 11. One endthereof is beveled as indicated at 29 as is usual and intermediate itsends and on the underside is a notch 30 formed at its opposite endswith'V-shapedcam lugs 31 and 32. This bolt 28 is intended to bereversible and either of the lugs 31 or 32 can be brought into play forcooperation with the cam surfaces 17 and 18 in the manner shown inFigure 3. The

PATENT oTFIcE eaaoaa bolt is pr d throu h the a ncy f awn/situation ofthe latch bolt 28 having a simple spring 33 which is located in thecasing and b r against the inner end of the bolt.

The numega-ls' iia and 35 de'ignate knobs or buttons which are providwith screw-threaded sockets to-receive tb' aforementioned lugs 1-; and15. The nu'" erals 36 are merely door handies 21 95 which may or may notbe used in h manner shown in the drawings.

The structure is assembled as illustrated in the drawings and whenmounted in a door it is obvious that the two knobs 34 and 35 aredisposed on opposite sides of the door. Hence, the slidable actuatingplate 13 can be either pushed in toward the door or pulled out from thedoor and in either instance the cam coaoting elements 17, 18 and the camlug 32 serve to retract and release the latch bolt. This particularspring-pressed cam actuated latch bolt arrangement is, of course, notnew. It is, therefore, to be pointed out that ne feature of theinvention is the particular actuating plate 13. This is believed to befeasible, practicable and an improvement in that it is provided atopposite ends with screw-threaded shanks 14 and 15 to accommodate thedetachable renewable knobs or actuating members 34 and 35. Secondly, byhaving these detachable knobs 3d and 35 it is obvious that by removingone of the konbs the plate can be pulled through the slot in the coverplate 25 and extracted whereby to the latch bolt 23 to be bodily removedfor repairs or reversal. This is a simplified emcient assembiingadvantage. Thirdly the connotch 30 formed in its bottom with the two camnoses or lugs 31 and 32 is believed to be an additional improvement.

Moreover as before stated the keeper hole 19 and guide depression 20formed in the plate 13 to accommodate the swingable locking pin 24 andits features 21 and 23 is believed to be ingenious and a novelcontribution to this particulart art.

A careful consideration of the foregoing description in conjunction withthe illustrative drawings will enable the reader to obtain a clearunderstanding of the purpose, features and advantages, the explicitconstruction, and the invention as hereinafter claimed.

It is to be understood that minor changes in shape, size, relativeproportions, and materials may be resorted to in practice withoutdeparting from the spirit of the invention or the scope of the inventionas now claimed.

What is claimed is:

In a lock construction including a reciprocatorybolt operating member,said operating mem her having a keeper hole therein and a sloping recessin one face thereof which slopes downwardly to the hole, a supportingplate, a rocker shaft mounted for oscillation in said plate, and a rightangularly disposed depending locking pin carried by the shaft forcooperation with said recess and hole for locking the operating memberagainst movement.

ERNEST amt JACOBSON.

